Dual-Core Intel
®
Itanium
®
Processor 9000 and 9100 Series Datasheet
75
Thermal Specifications
5
Thermal Specifications
This chapter provides a description of the thermal features relating to the Dual-Core
Intel Itanium processor 9000 and 9100 series.
5.1
Thermal Features
The processor has an internal thermal circuit which senses when a certain temperature
is reached on the processor core. This circuit is used for controlling various thermal
states. In addition, an on-chip thermal diode is available for use by the thermal sensing
device on the processor.
Figure 5-1
shows the relationship between temperature, time,
and the thermal alert, enhanced thermal management (ETM), and thermal trip points.
Note:
Figure 5-1
is not intended to show a linear relationship in time or temperature as a
processor's thermal state advances from one state to the next state when the cooling
solution fails to control the processor temperature, as this is affected by many factors
such as cooling solution performance degradation and processor workload variations.
5.1.1
Thermal Alert
THRMALERT# is a programmable thermal alert signal which is part of the processor
system management feature. THRMALERT# is asserted when the measured
temperature from the processor thermal diode equals or exceeds the temperature
threshold data programmed in the high temp (THIGH) or low temp (TLOW) registers on
the sensor. Intel recommends using the upper temperature reference byte listed in the
Processor Information ROM when programming the THIGH register (see
Chapter 6
for
more details). This signal can be used by the platform to implement thermal regulation
features such as generating an external interrupt to tell the operating system that the
processor core die temperature is increasing.
Figure 5-1.
Dual-Core Intel
®
Itanium
®
Processor 9000 and 9100 Series Thermal Features
000653b
Time
Thermal Alert
Thermal Trip
ETM
Summary of Contents for Itanium 9010
Page 14: ...14 Dual Core Intel Itanium Processor 9000 and 9100 Series Datasheet Introduction ...
Page 78: ...78 Dual Core Intel Itanium Processor 9000 and 9100 Series Datasheet Thermal Specifications ...
Page 108: ...108 Dual Core Intel Itanium Processor 9000 and 9100 Series Datasheet Signals Reference ...
